Prosthetic tissue valve



FIG. 1 is a perspective view of my design for a prosthetic tissue valve;

FIG. 2 is a top elevational view thereof;

FIG. 3 is a bottom elevational view thereof; and,

FIG. 4 is a right side elevational view thereof; the left side, frontand rear elevational views thereof being identical to said right sideelevational view.

CLAIM I claim the ornamental design for a prosthetic tissue valve, asshown and described.